18" x 22" or 22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 6in actual front end outer dimensions

actual front end outer dimensions are approximately 32 5/8" width X 36 5/8" height

+ Product Details Size - 32"w X 22"h is the size for the duct opening measurement only

85" width X 15

+ Product Details Size - 12"w X 12"h X 2"d (for duct opening measurement only)

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18" x 22" or 22" x 18" Cube Core Eggcrate Return Air Filter Grille for 1" Filter Compatible With Duct 6in actual front end outer dimensions+ Product Details Perfect Fit & Easy Sizing Designed for a 18" x 22" OR 22" x 18" duct opening (measured at the opening), with actual outer dimensions of 20. 5" W x 24. 5" H. Please check the measuring guide to ensure a proper fit. Filter Size 17. 75" x 21. 75" x 1" Premium Airflow Efficiency High performance cube core eggcrate design allows 95% airflow efficiency, reducing energy costs and maximizing HVAC system lifespan. Durable, Rust Free Aluminum